#include <stdio.h>

float func(float a, float b);  

int main()
{
    float x, y, z;
    scanf_s("%f, %f", &x, &y);
    z = func(x, y);
    printf("z=%f\n", z);
    return 0;
}

float func(float a, float b)
{
    float c;
    c = a * a + b * b;
    return c;
}